(19)
(11) EP 1 439 296 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
24.05.2006 Bulletin 2006/21

(43) Date of publication A2:
21.07.2004 Bulletin 2004/30

(21) Application number: 03025349.6

(22) Date of filing: 04.11.2003
(51) International Patent Classification (IPC): 
B60K 6/04(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
Designated Extension States:
AL LT LV MK

(30) Priority: 16.01.2003 JP 2003008123

(71) Applicants:
  • KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Aichi-gun, Aichi-ken, 480-1192 (JP)
  • Toyota Jidosha Kabushiki Kaisha
    Toyota-shi, Aichi-ken 471-8571 (JP)

(72) Inventors:
  • Tomura, Syuji, K.K. Toyota Chuo Kenkyusho
    Aichi-gun, Aichi-ken 480-1192 (JP)
  • Ito, Yoshiaki, K.K. Toyota Chuo Kenkyusho
    Aichi-gun, Aichi-ken 480-1192 (JP)
  • Sato, Eiji, Toyota Jidosha Kabushiki Kaisha
    Toyota-shi, Aichi-ken 471-8571 (JP)
  • Sasaki, Shoichi, Toyota Jidosha Kabushiki Kaisha
    Toyota-shi, Aichi-ken 471-8571 (JP)

(74) Representative: Kramer - Barske - Schmidtchen 
European Patent Attorneys Patenta Radeckestrasse 43
81245 München
81245 München (DE)

   


(54) Torque transmission device and method of reducing effects of torque pulsations


(57) Torque pulsations generated in the torque of an engine are obtained from detection signals from a crankshaft angle detection sensor and an engine water temperature detection sensor at the time of an engine starting operation. A control unit controls an MG1 via a drive circuit so that a damping torque of the same phase as the torque pulsations is generated, and ensures that the torque pulsations of the engine are not transmitted to a ring gear from a planetary carrier.







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